The Supernait is a real classic and I'm sure you'll be over the moon with it if you go down that route, as an alternative it may be worth looking at the Heed kit, it's getting great reviews on WHF and other mags at the moment and for good reason, I've been borrowing their Si integrated with the X2 power supply for the last couple of weeks to listen to, if you like the Rega sound I think Heed will definately agree with you, the only way I can describe it as is extremely smooth and musical, somehow you get all the detail but it just sounds so well rounded, you can't help but be pulled into the music.
It might not be the most well known brand in this country but I would definately try and hunt out a demo if possible, I think you'll be very impressed, and as a WAF it comes in white and black, is half sized and very discrete, almost apple-esqe, you can't go wrong, I was so impressed I've decided to take them on at HiFi Lounge, actually I find most of the time I'm listening to the Heed kit other than anything else.